19294721274 has 16 divisors (see below), whose sum is σ = 40620466080. Its totient is φ = 6093069840.

The previous prime is 19294721267. The next prime is 19294721279. The reversal of 19294721274 is 47212749291.

It is not an unprimeable number, because it can be changed into a prime (19294721279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84625857 + ... + 84626084.

It is an arithmetic number, because the mean of its divisors is an integer number (2538779130).

Almost surely, 2^19294721274 is an apocalyptic number.

19294721274 is an abundant number, since it is smaller than the sum of its proper divisors (21325744806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19294721274 is a wasteful number, since it uses less digits than its factorization.

19294721274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169251965.

The product of its digits is 508032, while the sum is 48.

The spelling of 19294721274 in words is "nineteen billion, two hundred ninety-four million, seven hundred twenty-one thousand, two hundred seventy-four".